光波导中反射光强及其Goos-Hanchen位移的双稳态特性和应用研究

项目名称： 光波导中反射光强及其Goos-Hanchen位移的双稳态特性和应用研究

项目编号： No.61265001

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 桑明煌

作者单位： 江西师范大学

项目金额： 50万元

中文摘要： 由光学非线性和反馈机制共同作用产生的光学双稳态可用于制作光开关、光逻辑等全光交换器件，是实现超高速全光信息处理的核心技术，受到了国内外广泛关注。但是尚无基于光波导达到超低阈值光学双稳态的实验报道。近年来，双面金属包覆光波导已被证实对导波层的光学参量（如折射率）极其灵敏，适用于生化传感器的研发；且被验证能得到1.5毫米的超大Goos-H?nchen位移。在前期研究中，我们发现此类光波导对入射光强具有极大的增强效应（两个数量级）。考虑到高灵敏特性、光增强效应及超大GH位移，我们推测非线性材料为导波层的双面金属包覆光波导可实现超低阈值的反射光强及GH位移光学双稳态，这可能是集光传输与光交换为一体的一种新方法。本项目拟： 1）运用分析转移矩阵推导光学双稳态的解析公式 2）研究非线性双面金属包覆光波导的反射光强及GH位移的全光、电光双稳态特性 3）研究磁流体为导波层的双面金属包覆光波导的磁光双稳态

中文关键词： 光学双稳态；古斯--汉欣位移；双面金属包覆波导；光捕获；光学传感

英文摘要： Optical bistability, which stems from the combined effect of the optical nonlinearity and the feedback mechanism, is a cornerstone of the all-optical exchange devices, such as optical switch and optical logic, and is a key technology for realizing the ultra-high speed all-optical information processing. In spite of considerable progress, there is no report about the experimental investigation of ultra-low threshold optical bistability based on the optical waveguide. Recently, it was demonstrated that the double metal-cladding optical waveguide is extremely sensitive to optical parameters (e.g. refractive index) of the guiding layer and can achieve a 1.5mm giant Goos-H?nchen (GH) shift. These properties have already been used to develop the biochemical sensors with high sensitivity. Moreover, our recent experiments revealed that the incident light intensity can be enlarged as much as two orders in the double metal-cladding optical waveguide. Based on the high sensitivity, light enhancement effect and the giant GH shift, we conjecture that a mutational double metal-cladding optical waveguide whose guiding layer is nonlinear material can be utilized to obtain the reflection intensity and GH shift optical bistability within an ultra-low energy threshold. Our project may provide an effective method to integrate the l

英文关键词： Optical bistability；Goos-hanchen shift；Double metal-cladding waveguide；Optical trapping；Optical sensing